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- 2017
数字建筑模型整体投影真正射影像制作中的遮蔽检测方法
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Abstract:
为解决城市大比例尺真正射影像制作问题，提出了一种数字建筑模型（digital building model，DBM）整体投影遮蔽检测方法。该方法利用DBM表面以矢量三角面存储和平面图形投影内部栅格互不遮蔽的特点，首先以三角面为单元对整个建筑物进行正射投影得到房顶多边形；然后进行透视投影得到整个建筑物在像方的成像多边形，通过数字高程模型（digital elevation model，DEM）投影迭代算法得到该建筑物在传统正射影像上的成像多边形，两者求差集得到建筑物的遮蔽区域物方多边形；最后选取最优辅助影像对遮蔽区域进行纹理补偿，制作出真正射影像。实验结果表明，该方法能够快速准确地检测出影像遮蔽区域，为生成高质量真正射影像提供了保障和前提
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